Android and iOS' share gains continued to come at the expense of Research in Motion's Blackberry OS, which slid to 19.7 percent in August, down 2 percentage points from 21.7 percent in July, 23.4 percent in June and from 24.7 percent in May.

However, the company is bullish on new phones that incorporate the fresh "Mango" build of Windows Phone 7, the company's next-generation smartphone platform. Nokia (NYSE:NOK) is betting its company on the platform to save its foundering fortunes.